Abstract
This study investigated the effects of El Niño events on tropical cyclone (TC) characteristics over the western North Pacific (WNP) region. First, TC characteristics associated with large-scale atmospheric phenomena (i.e., genesis position, frequency, track, intensity, and duration) were investigated in the WNP in relation to various types of El Niño events—moderate central Pacific (MCP), moderate eastern Pacific (MEP), and strong basin-wide (SBW). Subsequently, the seasonal and regional variability of TC-induced rainfall across China was analyzed to compare precipitation patterns under the three El Niño types. When extreme El Niño events of varying degrees occurred, the local rainfall varied during the developmental and decaying years. The development of MEP and SBW was associated with a distinct change in TC-induced rainfall. During MEP development, TC-induced rainfall occurred in eastern and northeastern China, whereas in SBW, TC-induced heavy rainfall occurred in southwest China. During SBW development, the southwestern region was affected by TCs over a long period, with the eastern and northeastern regions being affected significantly fewer days. During El Niño decay, coastal areas were relatively more affected by TCs during MCP events, and the Pearl River basin was more affected during SBW events. This study’s results could help mitigate TC-related disasters and improve water-supply management.
Highlights
Recent advances in satellite remote sensing have provided the opportunity to assess the impact of anthropogenic climate change on natural disasters, a topic that has been explored in many studies [1,2,3,4]
This study focused on those pertinent to tropical cyclone (TC) that occurred in the selected decaying years and affected China, including their genesis position, tracks recorded at 6-h intervals, recurving location, central pressure, wind speed, and duration
To analyze the characteristics of TCs, we discussed variations in TCs during the developing and decaying years of moderate central Pacific (MCP), moderate eastern Pacific (MEP), and strong basin-wide (SBW) El Niño events and compared them with long-term averages to help predict the behavior of TCs occurring under different El Niño–Southern Oscillation (ENSO) types and phases
Summary
Recent advances in satellite remote sensing have provided the opportunity to assess the impact of anthropogenic climate change on natural disasters, a topic that has been explored in many studies [1,2,3,4]. Data obtained in studies on climate change can provide the data basis for environmental monitoring and forecasting, which have implications for global agriculture, livestock breeding, forestry, and other natural-resource industries. Many studies have shown that tropical cyclones (TCs) have a considerable impact on China’s summer rainfall. TC events accounted for 37% of natural disaster-related damage in China, and from 1994 to 2013, catastrophic TC events led to an economic loss of approximately 17% in China [3]. It is necessary to investigate the changing intensity and variability of TCs, as well as their local impacts
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